Title

Growth Kinetics Of Intermetallic Phases In U-Mo Vs. Al Alloy Diffusion Couples Annealed At 550°C

Keywords

Growth kinetics; Integrated interdiffusion coefficients; Interdiffusion; Metallic nuclear fuels; Uranium alloys

Abstract

This study examined the growth kinetics of intermetallic phases that develop in solid-to-solid diffusion couples assembled with U-7, 10 and 12wt.%Mo vs. Al alloys (Al, Al-2wt.%Si, Al-5wt.%Si, 4043 and 6061) after a diffusion anneal at 550°C for 24 hours. Based on interdiffusion microstructure and integrated interdiffusion coefficients, the addition of Si into the Al matrix alloy was observed to significantly reduce the growth rate of the intermetallic layer that primarily consisted of (U,Mo)Al4 phase. Growth rate of the (U,Mo)Al4 intermetallic layer also increases slightly with Mo content; however, it was not significant compared to the effect of alloying Si into Al alloys. Growth kinetics of (U,Mo)Al4 intermetallic layer appear highly sensitive to composition of U-Mo fuel alloy and Al cladding alloys, and must be an important criteria in alloy development/selection for optimum fuel performance with due consideration for composition-dependent multicomponent interdiffusion.

Publication Date

1-1-2007

Publication Title

Defect and Diffusion Forum

Volume

266

Number of Pages

149-156

Document Type

Article; Proceedings Paper

Personal Identifier

scopus

DOI Link

https://doi.org/10.4028/3-908451-45-0.149

Socpus ID

35348892642 (Scopus)

Source API URL

https://api.elsevier.com/content/abstract/scopus_id/35348892642

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